Can I use the RAM in my Macbook on a PC Laptop?

I'm pretty sure I know the answer to my question but just want some confirmation.

I bought a Macbook a few weeks ago and it came with 2GB of RAM. I want to go to 4GB as I found a great deal on Crucial memory from Fry's Electronics. My question is, can I use the 2GB that my Macbook came with in my fiance's Dell laptop? I'm pretty sure the answer is "Yes."

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